05536215 DATA: Discharge Tables, 2000

ILLINOIS RIVER BASIN

05536215 THORN CREEK AT GLENWOOD, IL

LOCATION.-- Lat 41°31'49", long 87°37'20", in SW1/4SE1/4 sec.9, T.35 N., R.14 E., Cook County, Hydrologic Unit 07120003, on right bank 20 ft downstream from abandoned Baltimore and Ohio Chicago Terminal Railroad bridge, 0.7 mi north of Chicago Heights, 0.8 mi south of Glenwood, 1.0 mi upstream from Deer Creek, and at mile 9.2.

DRAINAGE AREA.-- 24.7 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: May 1949 to current year. Prior to October 1974, records published with those for streams in the St. Lawrence River basin (WSP 1307, 1727, 1911, 2111, WDR IL 1971-74).

STAGE: Water years 1994-2000.

REVISED RECORDS.-- WSP 1437: 1955. WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder. Datum of gage is 610.97 ft above sea level.

REMARKS.-- Effluent from sewage-treatment plant 1 mi upstream consists of publicly supplied water from Lake Michigan and ground-water sources.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,700 ft³/s (estimated), July 18, 1996, gage height unknown; maximum recorded gage height, 11.26 ft, Aug. 17, 1968, may have been higher during period of no gage-height record, July 17-20, 1996; minimum daily, 6.0 ft³/s, July 4, Aug. 21, Sept. 5, 11, 25, 1949.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of Apr. 1947, reached a stage of 12.94 ft, from floodmarks, discharge not determined.

REMARKS FOR CURRENT YEAR.-- Records fair. Effluent from sewage-treatment plant upstream averaged 21.5 ft³/s during the year. The maximum monthly average was 35.1 ft³/s in June, and the minimum was 14.9 ft³/s in November.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	19	20	21	33	24	49	141	36	39	19
2	22	24	19	21	21	29	26	39	65	33	30	20
3	75	20	29	23	22	29	25	33	46	69	31	20
4	46	19	57	26	23	28	23	31	40	37	24	20
5	27	19	245	23	22	27	24	30	122	33	53	21

6	26	20	58	23	22	26	23	29	56	31	108	21
7	23	21	37	22	22	25	58	27	44	29	91	21
8	26	20	31	22	22	25	59	27	38	26	50	21
9	23	20	28	35	26	25	37	114	34	27	37	20
10	22	20	29	42	31	24	31	79	33	191	30	23

11	22	20	26	30	31	24	36	73	32	74	26	140
12	22	20	25	26	27	23	29	53	166	45	25	159
13	21	21	24	24	25	24	27	42	130	36	23	40
14	21	20	36	24	23	24	26	36	172	59	23	50
15	21	20	47	24	23	31	26	33	131	32	24	31

16	20	20	39	23	25	31	70	34	64	28	22	25
17	21	20	31	23	24	25	155	31	48	29	94	23
18	21	20	28	24	25	24	67	59	41	24	38	22
19	20	21	27	24	30	36	91	47	38	24	28	21
20	20	21	27	24	30	60	225	35	198	22	24	41

21	20	20	25	23	39	38	239	32	413	20	23	28
22	20	20	23	24	66	33	101	32	120	21	23	27
23	20	36	24	24	56	30	74	31	72	20	23	53
24	20	28	24	23	94	29	61	29	234	22	22	43
25	20	21	22	22	59	28	48	26	427	19	21	26

26	19	18	22	22	58	26	41	27	130	21	21	24
27	19	19	22	21	62	31	37	31	75	20	21	21
28	19	19	22	21	42	35	35	57	56	22	23	20
29	20	19	22	22	35	27	34	31	48	128	21	20
30	20	19	22	22	---	24	31	53	41	81	22	20

31	20	---	23	22	---	24	---	177	---	48	21	---

TOTAL	737	628	1113	749	1006	898	1783	1427	3255	1307	1061	1040
MEAN	23.8	20.9	35.9	24.2	34.7	29.0	59.4	46.0	108	42.2	34.2	34.7
MAX	75	36	245	42	94	60	239	177	427	191	108	159
MIN	19	18	19	20	21	23	23	26	32	19	21	19

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2000, BY WATER YEAR (WY)
MEAN	26.8	33.9	38.4	36.5	41.4	58.3	61.3	48.9	45.3	33.8	29.1	28.1
MAX	87.1	108	172	97.7	136	188	120	153	138	147	85.2	108
(WY)	1955	1991	1983	1993	1997	1979	1999	1996	1993	1996	1968	1961
MIN	11.0	9.31	11.4	12.0	19.3	20.8	19.3	18.2	12.4	14.0	11.8	9.28
(WY)	1950	1950	1954	1954	1964	1981	1971	1954	1949	1952	1949	1949

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1949 - 2000
ANNUAL TOTAL	17362		15004
ANNUAL MEAN	47.6		41.0		40.2
HIGHEST ANNUAL MEAN					67.9	1993
LOWEST ANNUAL MEAN					24.8	1954
HIGHEST DAILY MEAN	630	Jan 23	427	Jun 25	1500	A
LOWEST DAILY MEAN	14	Jan 1	18	Nov 26	6.0	B
ANNUAL SEVEN-DAY MINIMUM	16	Jan 1	19	Nov 26	8.5	Sep 5 1949
INSTANTANEOUS PEAK FLOW			1050	Jun 20, 24	2700 C	Jul 18 1996
INSTANTANEOUS PEAK STAGE			9.62	Jun 20, 24	11.26 D	Aug 17 1968
INSTANTANEOUS LOW FLOW			3.3	Jul 25	.00 E	Jun 3 1992
10 PERCENT EXCEEDS	78		71		68
50 PERCENT EXCEEDS	28		26		24
90 PERCENT EXCEEDS	20		20		15

A - Aug. 17, 1968; July 18, 1996 (estimated).
B - July 4, Aug. 21, Sept. 5, 11, 25, 1949.
C - Estimated, gage height unknown.
D - May have been higher during period of no gage-height record, July 17-20, 1996.
E - No effluent from sewage-treatment plant because of temporary equipment repair.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	19	20	21	33	24	49	141	36	39	19
2	22	24	19	21	21	29	26	39	65	33	30	20
3	75	20	29	23	22	29	25	33	46	69	31	20
4	46	19	57	26	23	28	23	31	40	37	24	20
5	27	19	245	23	22	27	24	30	122	33	53	21

6	26	20	58	23	22	26	23	29	56	31	108	21
7	23	21	37	22	22	25	58	27	44	29	91	21
8	26	20	31	22	22	25	59	27	38	26	50	21
9	23	20	28	35	26	25	37	114	34	27	37	20
10	22	20	29	42	31	24	31	79	33	191	30	23

11	22	20	26	30	31	24	36	73	32	74	26	140
12	22	20	25	26	27	23	29	53	166	45	25	159
13	21	21	24	24	25	24	27	42	130	36	23	40
14	21	20	36	24	23	24	26	36	172	59	23	50
15	21	20	47	24	23	31	26	33	131	32	24	31

16	20	20	39	23	25	31	70	34	64	28	22	25
17	21	20	31	23	24	25	155	31	48	29	94	23
18	21	20	28	24	25	24	67	59	41	24	38	22
19	20	21	27	24	30	36	91	47	38	24	28	21
20	20	21	27	24	30	60	225	35	198	22	24	41

21	20	20	25	23	39	38	239	32	413	20	23	28
22	20	20	23	24	66	33	101	32	120	21	23	27
23	20	36	24	24	56	30	74	31	72	20	23	53
24	20	28	24	23	94	29	61	29	234	22	22	43
25	20	21	22	22	59	28	48	26	427	19	21	26

26	19	18	22	22	58	26	41	27	130	21	21	24
27	19	19	22	21	62	31	37	31	75	20	21	21
28	19	19	22	21	42	35	35	57	56	22	23	20
29	20	19	22	22	35	27	34	31	48	128	21	20
30	20	19	22	22	---	24	31	53	41	81	22	20

31	20	---	23	22	---	24	---	177	---	48	21	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	19	20	21	33	24	49	141	36	39	19
2	22	24	19	21	21	29	26	39	65	33	30	20
3	75	20	29	23	22	29	25	33	46	69	31	20
4	46	19	57	26	23	28	23	31	40	37	24	20
5	27	19	245	23	22	27	24	30	122	33	53	21

6	26	20	58	23	22	26	23	29	56	31	108	21
7	23	21	37	22	22	25	58	27	44	29	91	21
8	26	20	31	22	22	25	59	27	38	26	50	21
9	23	20	28	35	26	25	37	114	34	27	37	20
10	22	20	29	42	31	24	31	79	33	191	30	23

11	22	20	26	30	31	24	36	73	32	74	26	140
12	22	20	25	26	27	23	29	53	166	45	25	159
13	21	21	24	24	25	24	27	42	130	36	23	40
14	21	20	36	24	23	24	26	36	172	59	23	50
15	21	20	47	24	23	31	26	33	131	32	24	31

16	20	20	39	23	25	31	70	34	64	28	22	25
17	21	20	31	23	24	25	155	31	48	29	94	23
18	21	20	28	24	25	24	67	59	41	24	38	22
19	20	21	27	24	30	36	91	47	38	24	28	21
20	20	21	27	24	30	60	225	35	198	22	24	41

21	20	20	25	23	39	38	239	32	413	20	23	28
22	20	20	23	24	66	33	101	32	120	21	23	27
23	20	36	24	24	56	30	74	31	72	20	23	53
24	20	28	24	23	94	29	61	29	234	22	22	43
25	20	21	22	22	59	28	48	26	427	19	21	26

26	19	18	22	22	58	26	41	27	130	21	21	24
27	19	19	22	21	62	31	37	31	75	20	21	21
28	19	19	22	21	42	35	35	57	56	22	23	20
29	20	19	22	22	35	27	34	31	48	128	21	20
30	20	19	22	22	---	24	31	53	41	81	22	20

31	20	---	23	22	---	24	---	177	---	48	21	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	19	20	21	33	24	49	141	36	39	19
2	22	24	19	21	21	29	26	39	65	33	30	20
3	75	20	29	23	22	29	25	33	46	69	31	20
4	46	19	57	26	23	28	23	31	40	37	24	20
5	27	19	245	23	22	27	24	30	122	33	53	21

6	26	20	58	23	22	26	23	29	56	31	108	21
7	23	21	37	22	22	25	58	27	44	29	91	21
8	26	20	31	22	22	25	59	27	38	26	50	21
9	23	20	28	35	26	25	37	114	34	27	37	20
10	22	20	29	42	31	24	31	79	33	191	30	23

11	22	20	26	30	31	24	36	73	32	74	26	140
12	22	20	25	26	27	23	29	53	166	45	25	159
13	21	21	24	24	25	24	27	42	130	36	23	40
14	21	20	36	24	23	24	26	36	172	59	23	50
15	21	20	47	24	23	31	26	33	131	32	24	31

16	20	20	39	23	25	31	70	34	64	28	22	25
17	21	20	31	23	24	25	155	31	48	29	94	23
18	21	20	28	24	25	24	67	59	41	24	38	22
19	20	21	27	24	30	36	91	47	38	24	28	21
20	20	21	27	24	30	60	225	35	198	22	24	41

21	20	20	25	23	39	38	239	32	413	20	23	28
22	20	20	23	24	66	33	101	32	120	21	23	27
23	20	36	24	24	56	30	74	31	72	20	23	53
24	20	28	24	23	94	29	61	29	234	22	22	43
25	20	21	22	22	59	28	48	26	427	19	21	26

26	19	18	22	22	58	26	41	27	130	21	21	24
27	19	19	22	21	62	31	37	31	75	20	21	21
28	19	19	22	21	42	35	35	57	56	22	23	20
29	20	19	22	22	35	27	34	31	48	128	21	20
30	20	19	22	22	---	24	31	53	41	81	22	20

31	20	---	23	22	---	24	---	177	---	48	21	---